Improvement in compound levers



@atgim New JOHN SIMPSON, OF MARIETTA, GEORGIA. Letters .Patent No. 85,864, dated Jamba/ry 12, 1869.

To all whom lit ma/y concern Be it known that I, J OBSN SIMPSON, of Marietta, in the county of Cobb, and State Y of Georgia, have invented a new and useful Improvement in Compound Levers; and I do hereby declare that the following is a full, clear, and exact description thereof', whichwill enable those skilled in the art to make and use the same, reference being had to the accompanying drawings,vibrmingpart of this specication, in which the figure is a side view of my improved compound lever connected with a shaft. 4

My invention has for its object to furnish an improved device for converting rectilinear into circular motion, which shall be convenient and effective, and less liable to become set upon the dead-point than the ordinary means for this purpose; and

It consists in the combination of the various parts of the device, as hereinafter more fully described.

A represents a sha, revolving in bearings in the ordinary manner.

B represents the ily-wheel ofthe shaft A.

To the end of the shaft A is attached a crank or v crank-wheel, (l, to the crank-pin of which is pivoted The other end of the connecting-rod H is pivoted ,to

the inner bend of the working lever D, as shown in theA figure. A

To the extended end of the lever F is pivoted the end of the lever, pitman, or piston-rod I, as the case may be.

By this construction, as the long arm of the lever I1 is moved in one or the other direction,'one ofthe connecting-rods E H pushes, and the other pulls upon the lever D, the combined eiiect acting upon the crank or` crank-wheel C, to give motion to the shaft A. By means of this device, the points of the application of power are so distributed that it will be almost impossible for the said device to become set upon the dead-point, or, in fact, `to have any dead-point.

Iclaim as new, and desire to secure by Letters Patent- The combination of' the S-shaped working lever D, fulcrum-lever F, and connecting-rods E and H, with each other and with the crank or crank-wheel O, and piston-rod, connecting-rod, or lever I, substantially as herein shown and described, and for the purposes set forth.

The above specieation of my invention signed by Witnesses JAMES M. WILSON, JOHN M. WALKER. 

